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3D concrete printing of eco-friendly geopolymer containing brick waste

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posted on 2024-07-26, 14:56 authored by Kirubajiny PasupathyKirubajiny Pasupathy, Saya Ramakrishnan, Jay SanjayanJay Sanjayan
This study investigates alkali-activated brick waste powder as the binder for developing 3D printable geopolymer mixes. The brick waste was used as a partial replacement to fly ash in geopolymer binders. The effect of brick waste content on the fresh properties of printable mixes, such as flow, setting time and rheological properties were investigated. Besides, the hardened properties of 3D printed brick waste geopolymer were evaluated with the varying brick waste content in the mix. The test results demonstrated that the fresh properties of 3D printable mixes were improved with the brick waste content in the mix. Compared to the control mix, the mixes containing brick waste displayed high yield strength and apparent viscosity at an early age. On the contrary, the hardened properties of compressive strength and interlayer strength of 3D printed concrete specimens were decreased with the high brick waste content; however, the incorporation of brick waste for up to 10% has enhanced the hardened properties. Finally, the sustainability assessment of brick waste geopolymer studied with embodied energy and carbon emission calculations reveals the proposed geopolymer concrete could reduce the embodied energy and carbon emission by up to 60–80%, compared to OPC concrete.

Funding

Active rheology control of fresh concrete using responsive additives

Australian Research Council

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PDF (Published version)

ISSN

0958-9465

Journal title

Cement and Concrete Composites

Volume

138

Article number

104943

Pagination

104943-

Publisher

Elsevier BV

Copyright statement

Copyright © © 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/).

Language

eng

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